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- LP3982
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- Last added
- 2012-05-08
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National Semiconductor LP3982 Micropower Ultra Low-Dropout Low-Noise 300mA CMOS Regulator Manual
The LP3982 is a low‑dropout (LDO) CMOS linear regulator available in several fixed‑output versions and an adjustable version. It delivers up to 300 mA of output current and is packaged in an 8‑pin MSOP or LLP footprint, making it pin‑compatible with Maxim’s MAX8860. Designed for battery‑powered applications, it features a 1 nA typical shutdown current, 90 µA typical quiescent current, and a typical dropout voltage of 120 mV at 300 mA.
The device includes a bandgap reference, error amplifier, PMOS pass transistor, fault detection, and thermal overload protection. It is stable with small ceramic output capacitors (2.2 µF typical) and offers a 60 dB typical power‑supply‑rejection ratio. Application information covers output‑voltage setting, capacitor selection, shutdown operation, and typical performance curves.
National Semiconductor LP3982 specifications
| Output Current | 300 mA (guaranteed) |
|---|---|
| Dropout Voltage | 120 mV typical @ 300 mA |
| Quiescent Current | 90 µA typical |
| Shutdown Current | 1 nA typical |
| Input Voltage Range | 2.5 V to 6 V |
| Output Voltage Noise | 37 µV RMS (10 Hz‑100 kHz) |
| Power‑Supply Rejection Ratio | 60 dB typical |
Source: National Semiconductor LP3982 Micropower Ultra Low-Dropout Low-Noise 300mA CMOS Regulator Manual
All National Semiconductor LP3982 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the shutdown current of the LP3982?
The LP3982 has a typical shutdown current of 1 nA.
From: National Semiconductor LP3982 Micropower Ultra Low-Dropout Low-Noise 300mA CMOS Regulator Manual
What is the typical quiescent current of the LP3982?
The device draws about 90 µA of quiescent current under typical conditions.
From: National Semiconductor LP3982 Micropower Ultra Low-Dropout Low-Noise 300mA CMOS Regulator Manual
What is the typical shutdown current of the LP3982?
The LP3982 has a typical shutdown current of 1 nA.
From: National Semiconductor LP3982 Micropower Ultra Low-Dropout Low-Noise 300mA CMOS Regulator Handbook
What input voltage range does the LP3982 support?
The device operates with an input voltage from 2.5 V to 6.0 V.
From: National Semiconductor LP3982 Micropower Ultra Low-Dropout Low-Noise 300mA CMOS Regulator Handbook